👷 This calls for tests

spec/api-browser-window-spec.js

@@ -2514,6 +2514,15 @@ describe('BrowserWindow module', () => {
     const code = `(() => "${expected}")()`
     const asyncCode = `(() => new Promise(r => setTimeout(() => r("${expected}"), 500)))()`
     const badAsyncCode = `(() => new Promise((r, e) => setTimeout(() => e("${expectedErrorMsg}"), 500)))()`
+    const errorCodes = {
+      Error: 'Promise.reject(new Error("Wamp-wamp"))',
+      ReferenceError: 'Promise.reject(new ReferenceError("Wamp-wamp"))',
+      EvalError: 'Promise.reject(new EvalError("Wamp-wamp"))',
+      RangeError: 'Promise.reject(new RangeError("Wamp-wamp"))',
+      SyntaxError: 'Promise.reject(new SyntaxError("Wamp-wamp"))',
+      TypeError: 'Promise.reject(new TypeError("Wamp-wamp"))',
+      URIError: 'Promise.reject(new URIError("Wamp-wamp"))'
+    }
 
     it('doesnt throw when no calback is provided', () => {
       const result = ipcRenderer.sendSync('executeJavaScript', code, false)
@@ -2561,6 +2570,17 @@ describe('BrowserWindow module', () => {
         done()
       })
     })
+    it('rejects the returned promise with an error if an Error.prototype is thrown', async () => {
+      for (const errorKey in errorCodes) {
+        await new Promise((resolve) => {
+          ipcRenderer.send('executeJavaScript', errorCodes[errorKey], true)
+          ipcRenderer.once('executeJavaScript-promise-error-name', (event, name) => {
+            assert.equal(name, errorKey)
+            resolve()
+          })
+        })
+      }
+    })
     it('works after page load and during subframe load', (done) => {
       w.webContents.once('did-finish-load', () => {
         // initiate a sub-frame load, then try and execute script during it

spec/static/main.js

@@ -217,6 +217,10 @@ app.on('ready', function () {
       window.webContents.send('executeJavaScript-promise-response', result)
     }).catch((error) => {
       window.webContents.send('executeJavaScript-promise-error', error)
+
+      if (error && error.name) {
+        window.webContents.send('executeJavaScript-promise-error-name', error.name)
+      }
     })
 
     if (!hasCallback) {